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Description: This control ensures that OCI SSH access is restricted from the internet. GCP Firewall Rules are specific to a VPC NetworkOCI Security List and Security Groups uses Applications (Protocol, Port) and Network IP address as source and destination to allow traffic to VNICs in a subnet. Each rule either allows or denies traffic when its conditions are met. Its conditions allow you to specify the type of traffic, such as ports and protocols, and the source or destination of the traffic, including IP addresses, subnets, and instances. Network IP addresses with Generic (0.0.0.0/0) incoming traffic from internet to VPC or VM instance VCN using SSH on Port 22 can must be avoided in the Security List and Security Groups.

Remediation Steps:

Perform following to update bucket access policies the security rules in security List :

1. Login to the OCI console at https://www.oracle.com/cloud/sign-in.html.

2. In navigation click Networking and then click Virtual Cloud Networks.

3. Click on the VCN reported.

4. Under Resources, click Network List.

5. Select the security List reported.

6. Under Resources, click either Ingress Rules.

7. To edit rule with IP Protocol TCP and port 22, click Edit Rule.

8. Edit the Source CIDR from 0.0.0.0/0 to specific IP addresses or network.

9. Click Save Changes.

Important:

Reference:

• https://docs.oracle.com/en-us/iaas/Content/Network/Concepts/securitylists.htm

• https://docs.oracle.com/en/engineered-systems/advanced-support-gateway/install/gncct.html